| 219 / | HD | ELECTRIC HEATING |
| 50 | DF | METAL HEATING (E.G., RESISTANCE HEATING) {19} |
| 78.01 | DF | .~ For bonding with pressure (e.g., resistance welding) {16} |
| 108 | DF | .~.~ Systems of current supply {7} |
| 112 | DF | .~.~.~ Stored energy discharge (e.g., inductive) {1} |
| 113 | ![]() | .~.~.~.~ Condenser discharge |